From 5f92c329364c0bf2d3a356da5e8759fbe349f9d1 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 30 Aug 2007 22:27:28 -0700 Subject: [SPARC64]: Fix several bugs in MSI handling. 1) sun4{u,v}_build_msi() have improper return value handling. We should always return negative error codes, instead of using the magic value "0" which could in fact be a valid MSI number. 2) sun4{u,v}_build_msi() should return -ENOMEM instead of calling prom_prom() halt with kzalloc() of the interrupt data fails. 3) We 'remembered' the MSI number using a singleton in the struct device archdata area, this doesn't work for MSI-X which can cause multiple MSIs assosciated with one device. Delete that archdata member, and instead store the MSI number in the IRQ chip data area. Signed-off-by: David S. Miller --- arch/sparc64/kernel/pci_sun4v.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'arch/sparc64/kernel/pci_sun4v.c') diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c index 466f4aa8fc8..da724b13e89 100644 --- a/arch/sparc64/kernel/pci_sun4v.c +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -940,13 +940,13 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, if (msi_num < 0) return msi_num; - devino = sun4v_build_msi(pbm->devhandle, virt_irq_p, - pbm->msiq_first_devino, - (pbm->msiq_first_devino + - pbm->msiq_num)); - err = -ENOMEM; - if (!devino) + err = sun4v_build_msi(pbm->devhandle, virt_irq_p, + pbm->msiq_first_devino, + (pbm->msiq_first_devino + + pbm->msiq_num)); + if (err < 0) goto out_err; + devino = err; msiqid = ((devino - pbm->msiq_first_devino) + pbm->msiq_first); @@ -971,7 +971,7 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, if (pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_VALID)) goto out_err; - pdev->dev.archdata.msi_num = msi_num; + sparc64_set_msi(*virt_irq_p, msi_num); if (entry->msi_attrib.is_64) { msg.address_hi = pbm->msi64_start >> 32; @@ -993,8 +993,6 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, out_err: free_msi(pbm, msi_num); - sun4v_destroy_msi(*virt_irq_p); - *virt_irq_p = 0; return err; } @@ -1006,7 +1004,7 @@ static void pci_sun4v_teardown_msi_irq(unsigned int virt_irq, unsigned long msiqid, err; unsigned int msi_num; - msi_num = pdev->dev.archdata.msi_num; + msi_num = sparc64_get_msi(virt_irq); err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi_num, &msiqid); if (err) { printk(KERN_ERR "%s: getmsiq gives error %lu\n", -- cgit v1.2.3